Dock light



FIG. 1 is a perspective view of the dock light, with the broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a bottom view of the dock light;

FIG. 3 is a side elevational view of the dock light;

FIG. 4 is a rear view of FIG. 3;

FIG. 5 is a side elevational view of the dock light with it resting on its front end; and,

FIG. 6 is a side elevational view of FIG. 5. 

The ornamental design of the dock light, as shown and described. 